When 12 Monkeys returns for its third season, Cole (Aaron Stanford) will discover the shocking truth that the Witness is his own son — who nearly unmasks himself in the exclusive trailer below!

Based on the 1995 film of the same name, the Syfy series follows weary time traveler James Cole (Aaron Stanford) and virologist Cassandra Railly (Amanda Schull) as they attempt to save the world from the Army of the 12 Monkeys, who released a plague that kills off most of humanity.

The third season picks up months after Cassie was kidnapped by the Army of the 12 Monkeys and discovered that she is the mother of the Witness. How will they handle the truth? Check out the promo, which includes your first look at Christopher Lloyd as the Pallid Man’s father.

12 Monkeys returns Friday, May 19, airing 8-11 p.m. ET each night throughout the weekend until Sunday, May 21 on Syfy.